Solenopsis impolita

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Solenopsis impolita
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Solenopsis
Species complex: pygmaea
Species: S. impolita
Binomial name
Solenopsis impolita
Moreno, Mackay & Pacheco, 2013

Solenopsis impolita, MCZ holotype worker, side.jpg

Solenopsis impolita, MCZ holotype worker, top.jpg

Specimen Labels

Only known from the type material, nothing is known about the biology of Solenopsis impolita.


A New World thief ant that is a member of the pygmaea species complex.

Pacheco and Mackay (2013) - Worker - The workers are small and concolorous pale yellow in color. The head is coarsely punctate with an eye of one ommatidium. The lateral clypeal teeth are short, but well developed and the extralateral teeth are absent. The scape is short at 0.240 mm in total length. The sculpture of this ant is smooth and it has little pilosity on body surfaces.

Solenopsis impolita is unique in the pygmaea species complex. It is easily recognized in that the workers have only one ommatidium and are nearly devoid of pilosity. Additionally, it is one of few species that is completely smooth, lacking even horizontal striae on the metapleuron; a trait found in nearly all species.

Keys including this Species


Bandera Co, Texas.

Distribution based on Regional Taxon Lists

Nearctic Region: United States (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb



Known only from the worker caste.


The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • impolita. Solenopsis impolita Moreno, Mackay & Pacheco, in Pacheco & Mackay, 2013: 186, figs. 126-127, map 28 (w.) U.S.A.

Type Material

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.



Measurements (n=2). TL 1.26; HL 0.384-0.390 (0.387); HW 0.300-0.330 (0.315); EL 0.012; ED 0.012; SL 0.240; FSL 0.090; CI 76.9-85.9 (81.4); SI 61.5-62.5 (62.0); PL 0.060-0.066 (0.063); PW 0.090; PI 66.7-73.3 (70.0); PPL 0.078-0.084 (0.081); PPW 0.102; PPI 76.5-82.4 (79.4); WL 0.240-0.288 (0.264); PSL 0.018; PSW 0.018.

Small; concolorous pale yellow, translucent throughout body; head quadrate, longer than wide, coarsely punctate, sides of head convex; lateral clypeal teeth short, well developed; extralateral teeth absent; clypeal carinae weakly defined; eyes small, one ommatidium; scape short, extends slightly more than 2/3 distance to posterior lateral corner of head; minor funicular segments 3-8 short; mesosoma smooth and shiny; posterior propodeal margin rounded viewed laterally; propodeal spiracle small, round; petiole wider than postpetiole viewed laterally; petiolar node triangular, round, petiolar peduncle lacking tooth or flange ventrally; postpetiolar node small, semicircular, lacking tooth or flange ventrally.

Nearly devoid of pilosity, with few hairs present throughout body.


From Latin, impolitus, meaning rough or unpolished referring to the milky, translucent appearance of the cuticle.